The ToolzPark blog
Plain-English explainers on the maths, money and formulas behind our tools.
How to Calculate Your BMI Correctly (And What the Number Actually Means)
Body Mass Index is one of the most searched health calculations online — here's how it's calculated, why it's useful, and where it falls short.
FinanceEMI vs Simple Interest: What's the Difference When You Borrow Money?
Not all loan calculations are the same. Here's a plain-English breakdown of how EMI, simple interest and compound interest actually differ.
Math7 Percentage Calculations You'll Actually Use in Everyday Life
From sale discounts to salary raises, percentages show up everywhere. Here are the calculations worth knowing by heart.
DeveloperWhy Properly Formatted JSON Matters (Even If You Didn't Write It)
Minified API responses and config files are hard to read by design. Here's why formatting JSON before you debug it saves real time.
SecurityWhat Actually Makes a Password Strong in 2026
Length matters more than complexity rules. Here's what current guidance actually recommends for building passwords that hold up.
ReferenceA Quick Reference Guide to Metric and Imperial Conversions
Cooking with a recipe in the wrong unit system? Travelling somewhere that uses different measurements? Here's a practical primer.